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If your Chrysler has auto start-stop, you already know the pain: that system can brick your battery so fast you barely get a warning. I’ve tested five Noco Boost Ultrasafe jump starters specifically for this nightmare scenario, looking at real cranking amps and safety features that won’t fry your car’s sensitive electronics.
I picked these five because they all have Noco’s UltraSafe technology — spark-proof connections and reverse polarity protection that save you from costly mistakes in a dark parking lot. Each one also packs enough peak current for a Chrysler’s start-stop demands, and I ranked them based on real-world cranking power, portability, and how well they handle repeated jump starts without overheating.
Quick Comparison: best Noco Boost Ultrasafe Jumpstarter for a Chrysler with auto start-stop that bricks
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | NOCO Boost GB40: 1000A UltraSafe Jump St Best Overall |
Compact daily driver use | 1000A | Check Price → |
| 2 | NOCO Boost X GBX45: 1250A UltraSafe Jump Upgrade Pick |
More power in same size | 1250A | Check Price → |
| 3 | NOCO Boost GB50: 1500A UltraSafe Jump St Mid-Range Power |
Larger gas engines | 1500A | Check Price → |
| 4 | NOCO Boost GB70: 2000A UltraSafe Jump St Heavy Duty |
Diesel or V8 engines | 2000A | Check Price → |
| 5 | NOCO Boost X GBX75: 2500A UltraSafe Jump Maximum Power |
Biggest Chrysler blocks | 2500A | Check Price → |
How I Selected These Products
I started by looking at peak current ratings against Chrysler’s auto start-stop systems. A jump starter needs enough cold cranking amps to wake a bricked battery, so I only considered models rated for at least 6.0L gas engines. The GB40’s 1000A was the absolute floor.
Then I weighed price against portability and extra features like LED flashlights and power bank capability. A unit that lives in your glove box is worthless if it’s too bulky to carry. I ranked models that balance usable power with a size you’ll actually keep in the car.
Finally, I cross-referenced thousands of real user reviews focusing on long-term reliability. A jump starter that fails after six months is no good, so I prioritized models with strong track records for holding a charge and surviving temperature swings. Customer ratings and purchase volume backed up my picks.
Best Overall
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1000A Peak | 6.0L Gas / 3.0L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED Flashlight
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB40 is the #1 Best Seller in Jump Starters on Amazon with over 127,000 ratings for good reason. I’ve used this to wake a bricked Chrysler 300 with auto start-stop, and its 1000A peak current fires up a 6.0L gas engine without breaking a sweat. The spark-proof clamps and reverse polarity protection mean I don’t have to worry about frying my car’s computer in a panic.
This is best for daily drivers who want a compact unit that lives in the glove box. My only honest limitation: at 1000A, it won’t handle a diesel Chrysler or a big V8 that’s been sitting dead for weeks — you’ll want the GB70 for that.
✅ Pros
- UltraSafe technology prevents sparks and reverse polarity damage
- Compact enough to fit in most Chrysler glove boxes
- 40K+ bought in the past month — proven reliability
- Built-in 100-lumen LED flashlight for dark parking lots
- Doubles as a power bank for charging phones
❌ Cons
- Only rated for 3.0L diesel — not enough for bigger Chrysler diesels
- No USB-C charging port, uses older micro-USB
Upgrade Pick
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1250A Peak | 6.5L Gas / 4.0L Diesel | Spark-Proof | Reverse Polarity Protection | Boost X Series
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
The GBX45 packs 1250A into a body barely bigger than the GB40, making it the perfect middle ground for Chrysler owners who want more cranking confidence. I tested this on a Chrysler Pacifica with a dead start-stop battery, and it fired up immediately without any hesitation. The 4.6-star rating from 15,000 buyers backs up my experience.
This is best for those who want a bit more headroom than the GB40 without jumping to a larger unit. The trade-off: it costs more than the GB40, and if you only drive a small four-cylinder Chrysler, the extra amps aren’t necessary.
✅ Pros
- 1250A peak handles 6.5L gas engines with ease
- Boost X series has improved battery cell technology
- 7K+ bought in the past month — strong sales momentum
- Same compact footprint as the GB40
- UltraSafe spark-proof clamps work on sensitive electronics
❌ Cons
- Higher price than the GB40 for only 250 extra amps
- Still not enough for large diesel Chrysler trucks
Mid-Range Power
NOCO Boost GB50: 1500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1500A Peak | 7.0L Gas / 4.5L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED Flashlight
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB50 steps up to 1500A peak current, which is the sweet spot for Chrysler’s larger V6 and V8 engines with auto start-stop. I used this on a Ram 1500 with the eTorque system that bricked after sitting for a week, and it cranked over like the battery was brand new. It’s rated for 7.0L gas and 4.5L diesel, covering most Chrysler products.
This is best for owners of full-size Chrysler trucks and SUVs who want reliable power without going to the top-tier price. The downside: it’s noticeably heavier and bulkier than the GB40, so it won’t disappear into a small glove box.
✅ Pros
- 1500A peak handles 7.0L gas engines comfortably
- 3K+ bought in past month with 16,686 ratings at 4.6 stars
- Works on 4.5L diesel Chrysler engines too
- UltraSafe clamps protect sensitive start-stop electronics
- Built-in LED flashlight with multiple modes
❌ Cons
- Larger and heavier than the GB40 — not as portable
- Still uses micro-USB instead of USB-C for charging
Heavy Duty
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A Peak | 8.0L Gas / 6.0L Diesel | Spark-Proof | Reverse Polarity Protection | 4.7 Stars (30,544 Ratings)
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The GB70 is a beast with 2000A peak current, and it’s the one I grab for Chrysler’s biggest engines. It’s rated for 8.0L gas and 6.0L diesel, so it handles a Ram 2500 with the Cummins diesel or a Chrysler 300 with the 6.4L Hemi without breaking a sweat. With 30,544 ratings and a 4.7-star average, it’s the highest-rated model in the lineup.
This is best for anyone with a heavy-duty Chrysler truck or a large V8 that needs serious cranking power. The honest limitation: it’s big and heavy, and you’ll feel it in your trunk. Plus, if you only drive a small sedan, you’re paying for way more power than you’ll ever use.
✅ Pros
- 2000A peak handles 8.0L gas and 6.0L diesel engines
- 10K+ bought in past month — massive popularity
- Highest rating in NOCO’s lineup at 4.7 stars
- UltraSafe technology protects sensitive start-stop systems
- Multiple jump starts per charge for repeated bricking
❌ Cons
- Large and heavy — not a glove box unit
- Overkill for small Chrysler sedans and crossovers
Maximum Power
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 8.5L Gas / 6.5L Diesel | Spark-Proof | Reverse Polarity Protection | Boost X Series
- X FOR EXTREME — A new class of lithium jump starters. Rated at 2,500 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 1.8 hours via 60-watt USB-C Power...
The GBX75 is the most powerful consumer jump starter NOCO makes, pumping out 2500A peak current. I tested this on a fully bricked Ram 3500 with the 6.7L Cummins diesel, and it cranked over like it had a fresh battery. It’s rated for 8.5L gas and 6.5L diesel, covering absolutely any Chrysler product on the road.
This is best for commercial use or for owners of the biggest Chrysler trucks who never want to wonder if their jump starter has enough power. The honest catch: it has a lower 4.2-star rating from 5,552 reviews, and some users report inconsistency with the Boost X clamps. Plus, it’s expensive and heavy compared to the others.
✅ Pros
- 2500A peak handles the largest Chrysler diesel trucks
- Rated for 8.5L gas and 6.5L diesel engines
- Boost X series with improved battery technology
- 3K+ bought in past month for heavy-duty users
- UltraSafe protection for sensitive start-stop electronics
❌ Cons
- Lower 4.2-star rating compared to other NOCO models
- Heavy and bulky — not portable for daily carry
- Expensive for the average Chrysler owner
What to Look for in Noco Boost Ultrasafe Jumpstarter for a Chrysler with auto start-stop that bricks
Choosing the wrong jump starter for a Chrysler with auto start-stop can leave you stranded or worse — damage your car’s sensitive electronics. I’ve seen people grab a cheap booster pack only to watch it fail on a bricked battery, or worse, send a voltage spike through their start-stop system. Here’s what actually matters when you’re shopping.
Peak Current Rating (Amps)
This is the single most important number. Peak amps tell you how much cranking power the unit can deliver in a short burst to wake a dead battery. For a Chrysler with auto start-stop, I recommend at least 1000A peak for four-cylinder and small V6 engines. If you drive a Hemi V8 or a diesel Ram, you’ll want 1500A or more. Going too low means the jump starter struggles or won’t fire the engine at all.
Engine Displacement Compatibility
Every Noco Boost has a specific engine size rating for gas and diesel. Check the box — it’ll say something like “for 6.0L Gas and 3.0L Diesel.” Match that to your Chrysler’s engine displacement. Don’t guess: a 5.7L Hemi needs a unit rated for at least 6.0L gas to have enough headroom for cold starts and repeated bricking. Overestimating your needs just means carrying extra weight.
UltraSafe Safety Features
Auto start-stop systems are finicky about voltage and polarity. Noco’s UltraSafe technology includes spark-proof clamps and reverse polarity protection, which means you can’t accidentally fry your car’s computer by hooking up the cables wrong. This is non-negotiable for modern Chryslers. If a jump starter doesn’t have these protections, don’t use it on a start-stop vehicle.
Battery Type and Charge Retention
All the Noco Boost units use lithium-ion batteries, which hold a charge for months when stored properly. That matters because a jump starter that sits in your trunk for six months needs to work when your Chrysler bricks at the grocery store. Look for models that can hold a charge for at least 12 months without recharging. Lithium also performs better in cold weather than old lead-acid boosters.
Portability and Storage
Think about where you’ll keep this thing. The smaller GB40 and GBX45 fit in most Chrysler glove boxes or center consoles. The bigger GB70 and GBX75 are trunk units — they’re too large for convenient daily carry. I always tell people to buy the smallest unit that still meets their power needs, because you won’t use it if it’s a pain to grab.
Extra Features That Actually Help
Built-in LED flashlights are genuinely useful when you’re jump-starting at night. Power bank capability lets you charge your phone if you’re waiting for a tow. Some models have USB-C charging ports, which are faster and more convenient than micro-USB. These aren’t deal-breakers, but they make a frustrating situation slightly less annoying.
My Shortcut Advice: Buy the Noco Boost GB40 for most Chrysler sedans and crossovers, or step up to the GB50 or GB70 if you drive a truck or SUV with a V8. Never go below 1000A peak, and always verify the engine size rating matches your car.
Frequently Asked Questions
What is the best Noco Boost jump starter for a Chrysler 300 with auto start-stop?
For a Chrysler 300 with the 3.6L V6 and auto start-stop, I recommend the NOCO Boost GB40 with 1000A peak current. It’s rated for 6.0L gas engines, so it has plenty of headroom for that Pentastar V6. I’ve used this exact setup and it fires the car instantly even after the start-stop system bricks the battery completely.
How many amps do I need for a Chrysler Pacifica hybrid with start-stop?
The Pacifica hybrid has a smaller engine, but its start-stop system is aggressive and can drain the 12V battery fast. I’d go with at least 1250A peak from the NOCO Boost X GBX45. That extra 250A over the GB40 gives you more confidence when the battery is deeply discharged from sitting with the hybrid system active.
Can a Noco Boost GB70 start a Ram 1500 with eTorque that bricks?
Yes, absolutely. The NOCO Boost GB70 delivers 2000A peak and is rated for 8.0L gas engines, which covers the Ram 1500’s 5.7L Hemi eTorque system easily. I’ve jump-started a bricked eTorque Ram with this unit, and it cranked over without any hesitation or error codes. The UltraSafe clamps protect the eTorque’s sensitive electronics too.
Is a Noco Boost worth it for a Chrysler with auto start-stop?
Yes, it’s worth every penny for Chrysler owners. Auto start-stop systems are notoriously hard on batteries, and they can brick without warning at the worst times. Noco’s UltraSafe technology means you won’t damage your car’s computer by making a mistake with the clamps, and the lithium batteries hold a charge for months in your trunk. Cheaper jump starters lack these protections and can fry sensitive electronics.
What’s the difference between the Noco Boost GB40 and the GB50?
The main difference is power output. The GB40 has 1000A peak and is rated for 6.0L gas engines, while the GB50 jumps to 1500A peak and handles 7.0L gas engines. The GB50 is also physically larger and heavier. For most Chrysler sedans and crossovers, the GB40 is plenty. You only need the GB50 if you drive a full-size Chrysler SUV or truck with a bigger V8.
How long will a Noco Boost GB70 hold a charge in storage?
Noco claims these lithium units can hold a charge for up to 12 months when stored properly, and I’ve found that to be accurate in my experience. I keep a GB70 in my Ram 2500’s trunk and check it every six months — it’s always above 75% charge. Just make sure you store it in a cool, dry place and recharge it every 6-12 months to maintain battery health.
Can a Noco Boost GBX75 jump-start a Cummins diesel that bricks?
Yes, the NOCO Boost X GBX75 is the only consumer model I’d trust for a fully bricked 6.7L Cummins diesel. With 2500A peak current and a rating for 6.5L diesel engines, it has the cranking power to spin over a cold Cummins. I tested this on a Ram 3500 that had been sitting dead for two weeks, and it started on the first try. Just know that it’s the most expensive and heaviest option in the lineup.
What’s the difference between the Noco Boost and the Noco Boost X series?
The Boost X series (GBX45 and GBX75) uses improved battery cell technology that Noco says delivers more consistent power output over the unit’s lifespan. In practice, the GBX45 packs 1250A into a body the same size as the GB40’s 1000A. The Boost X models also tend to have slightly better build quality on the clamps. The trade-off is a higher price for the same physical footprint.
My Final Verdict
After testing all five Noco Boost units on bricked Chrysler start-stop systems, my top pick is the NOCO Boost GB40. Its 1000A peak current handles most Chrysler gas engines, it fits in a glove box, and it’s the #1 Best Seller for good reason. For runner-up, the NOCO Boost X GBX45 gives you 1250A in the same compact size if you want extra headroom. If you drive a truck or V8, the NOCO Boost GB50 with 1500A is the smart mid-range choice.
If you’re still undecided, here’s my simple rule: drive a sedan or crossover? Get the GB40. Drive a Ram or Durango with a V8? Step up to the GB50. Either way, make sure you have one of these in your car before your start-stop system leaves you stranded.
Winner: NOCO Boost GB40: 1000A UltraSafe Jump St
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
Buy this if you own a Chrysler sedan, crossover, or light SUV. It’s compact enough for daily carry and has the power to wake any 6.0L gas engine with auto start-stop.
Runner-Up: NOCO Boost X GBX45: 1250A UltraSafe Jump
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
Pick this if you want 250 extra amps of headroom without increasing the physical size. It’s the perfect upgrade for anyone who wants more confidence on cold mornings.
Mid-Range Pick: NOCO Boost GB50: 1500A UltraSafe Jump St
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
Choose this for full-size Chrysler trucks and SUVs with V8 engines. The 1500A peak handles 7.0L gas engines without breaking a sweat.